Malicious PDF — malware analysis report

Static analysis result for SHA-256 388388864a15aa1e…

MALICIOUS

PDF

48.8 KB Created: 2020-08-01 00:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adad52ff0635bad1ddbff4b9ae319e21 SHA-1: 6bf2ee5c0905684c06bae1a55ee9ca000f4966b8 SHA-256: 388388864a15aa1e8eab712024298d26eab477b9f051ee3c688c13723ac2d093
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=telegram+chat+commands'. This URL is presented within the document body, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=telegram+chat+commands
    • http://files.moagunworks.com/uploads/1/3/0/8/130873794/fiwarebeluzaf-puwurunaw-nidelujawojisag-mefupixewozen.pdf
    • http://files.rifugiovallegrande.store/uploads/1/3/0/7/130775704/6662335.pdf
    • http://files.tomhalvorson2018.com/uploads/1/3/1/3/131398406/9f7007d90ff.pdf
    • http://files.slebandboosters.com/uploads/1/3/0/7/130776131/a4b03938.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/64026767948.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/3874742.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/23175478632.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6843/files/7526124839.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/31695303257.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/386383019.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/xopenon.pdf
    • https://cdn.shopify.com/s/files/1/0436/7591/0294/files/html5_audio_player_with_playlist.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/59779277328.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/saxovaxavebofonosize.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008095.bin
d2dae2d3033b347dd4ee245a1d2153f470883271a5e2ac0f3f89fdc5571d53ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 5300 bytes
font_01_sfnt_off0000926b.bin
34a2f9c7295df8cc8030752e111066e747f08b60a0f91e49be2cc8c0bd025a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 10456 bytes

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